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([2001:b07:6468:f312:9af8:e5f5:7516:fa89]) by smtp.googlemail.com with ESMTPSA id f17-20020a1709064dd100b0087853fbb55dsm892986ejw.40.2023.01.26.09.47.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Jan 2023 09:47:50 -0800 (PST) Message-ID: Date: Thu, 26 Jan 2023 18:47:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.1 Subject: Re: [PATCH v2] KVM: x86: Do not return host topology information from KVM_GET_SUPPORTED_CPUID Content-Language: en-US To: Jim Mattson Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, seanjc@google.com, stable@vger.kernel.org References: <20221027092036.2698180-1-pbonzini@redhat.com> <3a23db58-3ae1-7457-ed09-bc2e3f6e8dc9@redhat.com> <8bdf22c8-9ef1-e526-df36-9073a150669d@redhat.com> From: Paolo Bonzini In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/26/23 17:06, Jim Mattson wrote: >>> Sadly, there isn't a single kernel involved. People running our VMM on >>> their desktops are going to be impacted as soon as this patch hits >>> that distro. (I don't know if I can say which distro that is.) So, now >>> we have to get the VMM folks to urgently accommodate this change and >>> get a new distribution out. >> >> Ok, this is what is needed to make a more informed choice. To be clear, >> this is _still_ not public (for example it's not ChromeOS), so there is >> at least some control on what version of the VMM they use? Would it >> make sense to buy you a few months by deferring this patch to Linux 6.3-6.5? > > Mainline isn't a problem. I'm more worried about 5.19 LTS. 5.19 is not LTS, is it? This patch is only in 6.1.7 and 6.1.8 as far as stable kernels is concerned, should I ask Greg to revert it there? Paolo